Method of operating a sewing machine work jogging attachment



Jan. 19, 1965 J. P. ENOS 3,166,036

METHOD OF OPERATING A SEWING MACHINE WORK JOGGING ATTACHMENT Original Filed Dec. 3, 1959 4 Sheets-Sheet l INVENTOR. John P. Enos Fig.l

BY WITNESS W flgakihQmnil i ATTOIRNEY Jan. 19, 1965 J. P. ENOS 3,166,036 METHOD OF OPERATING A SEWING MACHINE WORK JOGGING ATTACHMENT Original Filed Dec. 3, 1959 4 Sheets-Sheet 2 @ISO ' CD g a 3 5 5 IO 3 .9 '2 a Q a E .n F? '9) IO '1 u .2 9 uvmvrm b "I John P. Enos 5 BY '1 I r WITNESS i ATTOiPNEY Jan. 19, 1965 3,166,036

J. P. ENOS METHOD OF OPERATING A SEWING MACHINE WORK JOGGING ATTACHMENT Original Filed Dec. 3, 1959 4 Sheets-Sheet 3 M Fi .4 9

IN VEN TOR.

P. Enos John WITNESS Fig9 v ATTORNEY [14mm 9e Jan. 19, 1965 J. P. ENOS 3,166,036

METHOD OF OPERATING A SEWING MACHINE WORK JOGGING ATTACHMENT 4 Sheets-Sheet 4 Original Filed Dec. 3. 1959 Fig.l0

INVENTOR. 2O

John P Enos F|g.ll BY WITNESS ill/M I? Original :closed essentially in FIG. 1,

- 3,166,036 1 i l v lvmrnon on OPERA 'G A SEWING MACHINE Coin- This invention relates to work shifting attachments for United States Pa in place on a feed cover plate 25 carried on the bed pottion 26 of the sewing machine frame. By means of an attachment drive lever 27 which embraces a cylindrical boss 28 of the needle clamp 29 carried on the sewing ma;

' chine needle bar-30 the attachment, as will be hereinafter described, is capable of. shifting a work fabric in'a closed path relatively to the needle 31.

' The work shifting attachment illustrated in the .drawings is of thetypemorefully disclosed in my co-pending sewing machines, and more particularly to a novel and improved method of operating a sewing machine having a work shifting attachment applied thereto to produce covering stitches for darning or embroidery work.-

This application is a .division of my United States patent application No. 857,224, filed December 3, 1959 and now Patent No. 3,121,410.

It is an object of this invention to provide a novel and improved method for producing unique darning orembroidery stitches.

A further object ofthis invention is to provide darna ing or embroidery stitches by a novel method of operafiOI1 Qf a work jogging attachment in conjunction with a zigzag sewing machine having a bight controlling means which may be adjusted to reduce the bight of needle zigzag motion to zero and a neutral position control accessible for manual adjustment. r 1

With the above and additional objects and advantages in view as will hereinafter appear mechanisms suitable ance, aperture 46 for the feed blade, indicated generally I for practice of the method of this invention is hereinafter described in the accompanying drawings in lwhichn FIG. 1 represents a front perspective view of a z1gzag sewing machine having a work jogging attachment applied thereto in readiness for the practice of the method of this invention,

FIG. 2 represents. an enlarged top plan view :of the needle vibrating mechanism including the bight and neutral position controlling'means of the sewing machine ofFIG. 1, '1 a FIG. 3 represents across-sectional view taken substantially along'line 3-3 of FIG. 2,

FIG. 4 represents a cross-sectional view taken substantially along line 4-4 of FIG. 1 with the machine frame illustrated in vertical cross section,

FIG. 5 represents .a cross sectional view taken substantially along line 5-5 of FIG. 4, 1-.

FIGS. 6, 7 and 8, inclusive, represent diagrammatic views illustrating various positions of the mechanism dis- FIG. 11 represents a right side elevational view of the attachment with the cover illustrated in vertical crosssection and with the lid open,

FIG. 12 represents a left side elevational view of the attachment with a cover illustrated in vertical cross-sectionland with the lid open and,

FIG. 13 represents a bottom plan view of a pattern rack. 1 l

Referring to the drawings, the work shifting attachment 20 used in the practice of this invention is illustrated in FIG. 1 as applied to a zigzag sewing machine indicated generally as 21. The attachment is secured by means of a thumb nut 22 to a presser bar 23 of the sewing ma chine carried in the bracket arm portion 24 of the sewing machine frame, and is adaptedto clamp a work fabric United States application Serial No. 857,224, filed Decemher 7- 3, 1959' to which reference maybe had for a more I detailed disclosure. 'For an understanding of. this invention the following descriptionof the attachment will be sufficient;

, ,Referring to" FIGS. 10, 11 and 12, the work sh ifting attachment is assembled on an attachment frame 40-hav means of a headed screw 45. gRearwardly of the upstanding ears 43, the attachment frame is formed with a clearas-50. Four upstanding posts 51 are formed on the attachment frame, thB 'POStS at eachjside being spanned by rails 52. j

The feed blade having bifurcations 54 between which is pivoted a work engaging foot 55. Arear portion 56 of thefeed blade is offset upwardly and connectedto the forward portion by a vertical portion 57. The feed blade'is disposed on the attachment frame with the rear portion 56 bearing upon the rails 52, the vertical portion 57 extending through the clearance aperture 46, and the forward portion 53 extending beneath the attachment frame.

, The feed blade is slidably pivoted. to the attachment frame, that is, pivoted for swinging movement in the direction of the needle jogging movement of the sewing machine, and slidable for movement in a direction-transversely of that of the needle jogging movement. The forward portion 53 of the feed blade is formed with a slot 69 extending lengthwise of the feed blade. Extending lengthwise of the attachment frame 40 is a' slot 61 The shouldered shank portion 62 of a fulcrum pin 63 extends through both slots 60 and 61 to slidably pivotthe feed" blade to the frame. The fulcrum pin. 63 is embraced by an angle bracket 64 by which the pin may be selectively positioned along the slot 61. One limb'of the angle bracket abuts the floor of the attachment frame 40 while the other limb abuts a raised rib 65 providing a sidewall of the attachment frame. The rib 65 is formed with a slot 66 to accommodate a threaded stud 67 extending from the angle bracket 64.. A knurled nut 68 threaded on the stud 67 serves to clamp the angle bracket and thus the fulcrum pin 63in selected position relatively to the attachment frame. The fulcrum pin is maintained in the slots 60 and 61 and on the angle bracket 64 by means the ratcheting lever 87 is a pawl 91 biased inwardly by a;

spring 92.

Journaled in the attachment frame 40 coaxially with the 1 manual ratcheting lever 87 is a pawl carrier 93 to which a pawl 94 is pivoted. The pawl 94 is biased inwardly by 1 3,166,036. 1 P a Jail} 19.1965

so is formed with a forward some... 53

attachment frame." The lever 87 is frame by means of a spring 89.

I within the aperture.

.of the ears 115 seat in holes 117 formedinthe rear pora spring 95 acting between the 310.0 formedfintegrally witha small pinion 1 91.. The

pawl and the pavgdcarrier. A 1ink 96 loosely pivotedlas;at;97-to the pawl carrier is j pivoted in turn at 9810 the-drive lever 27 suchthat the I pawl carrier 92 will be oscillated in timed relation with -the'jndwise. reciprocation offthe sewing-machine needle Iournaled in the attachment frame'40 is a ratchetwheel,

ratchet wheel 190 is engaged by the bifurcated arms 102 land1ll3 of an arched'ileaf 3 spring 104;.securedfto the attachment frame and thus pressed firmly downwardly against the pawlfcarrier 93. The pawl-1pnthe manual ratcheting lever 87'iand thegpawl 94 on the pawl carrier 93 are bothdisposed-in operative engagement" with :the

ratchet wheel 10% and each is arranged to override the other in turning of theratchet wheel in one direction, 7

thus providing clutch means. efiectiveoperatively to interconnect thejoscillatory pawl carrier 93 to the pinion 191 "in only one direction of-turningmovement of the pawl;

carrier, theispri'ngarms 102 A retrograde' motion of the ratchet wheel.

The rear port-ionfi of 'the'feed blade '50 is formed with and 103 serving to prevent generally as 112 and best illustrated in. FIG. 13. The

body portioniof-the template is-formed with anendless f-grove- '-113finthe shape of the :tack'or" Stitches'tdbe' the tipaiioid the Unitedt'states" l atent 2,5 862,468, December .2," 1958 --to'-' had. Thissewing' machine includes .a pair of: coaxially arrangedhahdleslSil and'151 ff or controlling the axial iposition of a pair of cam followers 152 and 153 re- I spe'ctively so that the cam followers may be positioned each iinto en agement with a-' selected-ome et" a plurality ofcam disks 154 rotatablewith a sleeve 155 journaled;

in theIseWing machine bracket arm or intocngageme'rit with a selected one of a plurality of circular cam: surfaces 156, 157.011 158 formed on illustrated in FIG. 2 is pivoted as' at'165 to the swinging v needle bargate 33.

i I an aperture 11!) adapted toa'ccommodatewith clearance p g on all"sides, the' body portion 111 of a template indicated- 2 formed." As: illustrated in FIG 13, the groove 113 may: I

be riiade in the shapeof-an-eyeletend buttonhole or it may be of plain'oval or rectangular shapegi'Encompassing the groove-113, and of the same general shape, is an endless i rack ll-t'formed in thtemplate. A plurality of ears 115are formed on the template extending from the body portion l ll thereof and arranged to'span the aper ture 110 to support the "body portion of the template. 7 Depending pins 116 formed on two tion .56 of the feed blade to locate the template accurately in the aperture 110. r a g 'When the template 112 is properly positioned on the feed blade, the pinion llllwill be in mesh .with the endless-rack 114 of the template. The template may-be readily removed and exchanged since it is separable from the pinion 101 and from the feed blade simultaneously by a vertical movement ofthe template The feed blade aperture 110 is preferably formed with enlarged portions f12t'lzat each side to admit an operators finger tips at each side of the template for convenient removal and replace ment of templates. v i j The attachment frame and the actuating mechanism Fixed in the yoke 163 '-i a spherical guide head 16 6 embraced in a cylindrical-guide aperture .167 formed in field selector member-168 carried onthe annular. member'159. A- handle'169 extends from the 'animlarme'm ber157' outwardly through an aperture 170in the machine frame Where the handle-169 is accessible to the machine operator.

"When the co'axial handles-15G and 1 51 are positioned as illustrated in FIG. 2, the cam followers 152 and 153 Willbe positioned in engagement with the circular-cam surfaces 156 and.'158, -respectively,'ofthe annular member 159. The; barn followers 152 wand153 will --not vibrate "in'this position of" adjustment and, therefore, thebight motionof the sewing machine.

or stitch-by-sti-tch' Zigzag needle barwill be reduced to zero.

thereon is enclosed by acover indicated as which is' preferably made of sheet metal and issecured to, the attachment frame by screws 131 and 132. The cover is formed with an opening 133 which exposes the template 112 in any position of the feed blade. The cover open-Z ing isfitted with'a lid 134 hinged at 135 to the cover and provided with pivoted keeper .136 which may be. turned by meansof a knob 137 to secure the lid in closed position. i

possible. The workengaging foot partakes only of'pro gressive movement about a closed path as determined by the shape ofthe endless groove 113 and rack .114 of the foot of the attachment, the result will V As illustrated in FIG. 9,.

gether by superimposing a succeeding tack at rightangles thereon.

embroidery tack made as described above is the. comtemplate 112, the zigzag stitches being performed and controlled solelyiby the sewing machine. As illustrated .in FIG. 1, the attachment 2%) of this invention is shown applied toa zigzag sewing machine of FIGS.. 6,'7 and 8; however, illustrate'the effect upon the needle .bar 30 of movement of the handle 169 when the handleslSil and 151fare positioned-as illustrated in FIGS. 1 and 2. Turning'of the handle 169 will shift-the 7 neutral position of the needle barbetween extreme left and right hand position thereof.

.is auxiliary feed cover plate 180 which is secured onto the feed cover plate 25 regularly supplied on *the machine and provides a largersurface in-oppositionfto the work Since theattachment engaging foot of theattachment-.. 7

work engaging foot provides an orbital motion to the 55 in a closed circuitous pathtwith no stitch-by-stitchw zig'zag motion, and thesewing machine is adjusted such that. no zigzag motion is imparted to the needle, gthe attachment will shift the work in a shaped path when the'machine is oper-ated.- j

-If the handle 169 is initially positioneddn'one ex treme position of adjustment and then gradually adjusted by the operator to the opposite extreme position of ad;

justment in regular increments preferablyone increment during each orbital cycle of motion of the work engaging be. a tightly packed scroll or spiral tack of stitches. this type of 'stitchctack which may be made. effortlessly and quickly by the .method above described, is particularly suited to darning andembroidery work Since the stitches of the spiral group' may be made withperfect :alig'nment and with particularly. even spacing, smooth 'ilatdarning and embroidery work may be performed with-this arrangement- The parallel: lines of stitches.

made in any one stitching operation may be locked to- The maximum width of any one darning or bined width of the orbita'l pathof motionvof the. attachment 20 plus the total range of'neutral position .of the sewing machine needle. The length of any one particular darningfor embroidery tack will depend upon the size of the template 112 which is inserted in theattachment,

which referencemay be an annular member 1591 i l carried coneentrically'on thesleeve'155} i I 1 The cam followers152 and 153. are adapted also toi f engageythefffont face of a motion integrating plate F161 Whichdspivotally supported on trunnion"pins-1'62 carried in a yoke '163'formedon a pitman16 t-which as Thejwork engaging 'foot;55 of the attachment 20, illustrated in FIG.-1, maybe-arranged opposite to an closed buttonhole i sneaese 5 The tacks may be combined of course one alongside the other to fill any desired space.

Having thus set forth the nature of the invention, what I claim herein is:

The method of manipulating a zigzag sewing machine having a bight control means for determining the extent of lateral jogging of the sewing needle and a neutral position control member accessible to the machine operator for adjusting the lateral position of the sewing needle in the zero position of said bight control means, and a work shifting attachment actuated by said sewing machine for imparting stitch-by-stitch movement to the work fabric in a predetermined closed path relatively to the sewing machine frame, comprising, operating the sewing machine with the work shifting attachment applied thereto and the sewing machine bight control means set at the zero position of adjustment, and simultaneously shifting the I neutral position control member in one direction from one extr eme position to the other in regular increments,

one increment during each traverse of the predetermined 1 closed path of the Work fabric under the influence of said Work shifting attachment.

Reterences Qiteti in the file of this patent UNITED STATES PATENTS Russell Nov. 24, 1953 2,713,838 Johnson et a1 July 26, 1955 2,848,963 Johnson Aug. 26, 1958 2,862,468 Johnson Dec. 2, 1958 2,944,497 Waterman July 12, 1960 2,989,015 Taketomi June 20, 1961 3,059,599 Taketomi Oct. 23, 1962 3,070,050

H011 et al Dec. 25, 1962 

